CN114809921A - Explosion-proof high-pressure water jet drilling and expanding equipment for coal mine - Google Patents

Abstract

The invention relates to drilling and expanding equipment, in particular to explosion-proof high-pressure water jet drilling and expanding equipment for a coal mine. The technical problem is as follows: the explosion-proof high-pressure water jet drilling and expanding equipment for the coal mine is simple and convenient to operate, capable of automatically drilling and expanding and low in working strength. An explosion-proof high-pressure water jet drilling and expanding device for coal mines comprises a base, a mounting rack and the like; the top rotary type of base is equipped with the mounting bracket, and both sides all are connected with the deflector around the mounting bracket. According to the invention, the servo motor is started, the servo motor can drive the screw rod to rotate, and further can drive the guide pipe to move towards the left side through the moving block, so that the spray head moves to a place needing drilling and expanding, when the guide pipe moves towards the left side, the fixed plate can be driven to move towards the left side, and further the first belt pulley, the flat belt, the second belt pulley and the first cylindrical cam can be driven to move towards the left side, and the first cylindrical cam is matched with the second cylindrical cam, so that the connecting disc can be driven to rotate, and the spray head is automatically driven to rotate to drill and expand.

Description

Explosion-proof high-pressure water jet drilling and expanding equipment for coal mine

Technical Field

The invention relates to drilling and expanding equipment, in particular to explosion-proof high-pressure water jet drilling and expanding equipment for a coal mine.

Background

In coal mine production, more drill holes are adopted for pumping and draining coal bed gas, drilling and expanding of the pumping and draining drill holes are key technical measures for strengthening gas pumping and draining and eliminating coal and gas outburst danger, and coal bed gas emission can be greatly reduced, so that gas on a working face is prevented from exceeding the limit, and the outburst danger of the coal bed is eliminated.

The patent with the patent publication number of CN204060514U discloses a high-pressure water jet drilling and expanding device for coal mine cross-layer drilling and expanding, which comprises a drilling machine, a high-pressure water jet system, a drilling rod and a drill bit, wherein the drilling machine drives the drilling rod to rotate and drill into a coal mine layer; the propulsion nozzle forms the axial impact force to the coal body in the place ahead at least for the atress coal body bears the high pressure water and soaks and gradually break or grind the breakage by the drill bit, through addding the row's sediment nozzle towards the rear, can promote broken cinder to boring to expand entry one side motion, accelerates the discharge of cinder, avoids the cinder to pile up and causes row's sediment not smooth, increases the pore-forming degree of depth. However, the device needs manual work to control equipment to perform drilling and expanding operation, the working strength is high, and the fatigue of workers is easily caused, so that the drilling and expanding effect is influenced.

Therefore, an explosion-proof high-pressure water jet drilling and expanding device which is simple and convenient to operate, capable of automatically drilling and expanding and low in working strength is needed to be designed for the coal mine.

Disclosure of Invention

In order to overcome the defects that in the prior art, control equipment needs to be manually controlled to carry out drilling and reaming operation, the working strength is high, and the fatigue of workers is easily caused, so that the drilling and reaming effect is influenced, the technical problems of the invention are as follows: the explosion-proof high-pressure water jet drilling and expanding equipment for the coal mine is simple and convenient to operate, capable of automatically drilling and expanding and low in working strength.

The utility model provides an explosion-proof high pressure water jet bores and expands equipment for coal mine, which comprises a base, a mounting bracket, the deflector, the sliding plate, the pipe, the booster pump, injection mechanism and moving mechanism, the top rotary type of base is equipped with the mounting bracket, both sides all are connected with the deflector around the mounting bracket, two sliding plates about sliding type is connected with between the deflector, be connected with the pipe between the sliding plate, the right part upside of pipe is equipped with the booster pump, the booster pump is located between two sliding plates, the left part of pipe is equipped with injection mechanism, be equipped with the moving mechanism that is used for driving the pipe and removes on the mounting bracket.

Further, the injection mechanism comprises a rotating sleeve, a nozzle, connecting rods and a connecting disc, the rotating sleeve is rotatably sleeved at the left end of the guide pipe, the nozzle is arranged on the left side of the rotating sleeve, the right side of the rotating sleeve is evenly connected with 4 connecting rods at intervals, the connecting disc is connected between the right sides of the connecting rods, and the connecting disc is sleeved on the outer side of the guide pipe.

Further, the moving mechanism comprises an installation plate, a servo motor, a screw rod and a moving block, the installation plate is connected to the lower side of the right portion of the installation plate, the servo motor is arranged in the middle of the installation plate, the screw rod is connected to an output shaft of the servo motor, the moving block is connected to the screw rod through threads, and the moving block is connected with the guide pipe.

The rotating mechanism comprises a fixed plate, a first belt pulley, a flat belt, a second belt pulley, a first cylindrical cam, a rotating disc, a second cylindrical cam and a first spring, the fixed plate is arranged on the guide pipe, the first belt pulley is rotatably arranged on the inner side of the lower portion of the fixed plate, the second belt pulley is rotatably arranged on the inner side of the upper portion of the fixed plate and connected with the connecting disc, the flat belt is sleeved between the second belt pulley and the first belt pulley, the first cylindrical cam is arranged on the left side of the first belt pulley, the first belt pulley and the first cylindrical cam are sleeved outside the screw rod, the rotating disc is connected to the left side of the screw rod, the second cylindrical cam is connected to the right side of the rotating disc in a sliding mode, the second cylindrical cam is matched with the first cylindrical cam, and 4 first springs are connected between the second cylindrical cam and the rotating disc.

Further explain, still including water conservancy diversion mechanism, water conservancy diversion mechanism is including the bull stick, the baffle, the commentaries on classics board, the sliding sleeve, first connecting plate, second spring and dead lever, the right side of pipe is connected with the bull stick through the torsional spring rotary type, the middle part of bull stick is equipped with the baffle, the baffle is located the pipe inboard, both sides all are connected with the commentaries on classics board around the bull stick, the right side slidingtype connection of pipe has the sliding sleeve, both sides all are connected with first connecting plate around the sliding sleeve, first connecting plate is connected with homonymy commentaries on classics board slidingtype respectively, be connected with the second spring between sliding sleeve and the pipe, the right side of mounting bracket is connected with the dead lever, dead lever and sliding sleeve contact.

Further explain, still including angle adjustment mechanism, angle adjustment mechanism all is equipped with the fixed block including fixed block, slide bar, screens piece and third spring in both sides around the mounting bracket, all is equipped with the slide bar on the fixed block slidingtype, and the right side of slide bar all is connected with the screens piece, screens piece and base cooperation, all is connected with the third spring between the upper and lower both sides of screens piece and fixed block.

Further explaining, still including stabilizing mean, stabilizing mean is equipped with the slider including slider, second connecting plate and handle, the middle part slidingtype of base, is connected with the second connecting plate on the slider, and the upside of second connecting plate is connected with the handle.

The invention has the beneficial effects that: 1. according to the invention, the servo motor is started, the servo motor can drive the screw rod to rotate, and further can drive the guide pipe to move towards the left side through the moving block, so that the spray head moves to a place needing drilling and expanding, when the guide pipe moves towards the left side, the fixed plate can be driven to move towards the left side, and further the first belt pulley, the flat belt, the second belt pulley and the first cylindrical cam can be driven to move towards the left side, and the first cylindrical cam is matched with the second cylindrical cam, so that the connecting disc can be driven to rotate, and the spray head is automatically driven to rotate to drill and expand.

2. When the guide pipe moves towards the left side, the sliding sleeve can move towards the left side to be separated from the fixed rod, the second spring rebounds, the sliding sleeve and the first connecting plate can move towards the direction far away from the rotating rod, at the moment, the first connecting plate can pull the rotating plate to rotate 90 degrees anticlockwise, the rotating rod and the baffle plate are further driven to rotate 90 degrees anticlockwise, and at the moment, the baffle plate can not block water from entering the guide pipe any more.

3. The clamping block can clamp the base, so that the mounting frame cannot rotate at will under the condition that other people do not control the equipment, and when the angle of the guide pipe is adjusted, the mounting frame is controlled to rotate by force to enter into another clamping groove on the base due to the contractibility of the third spring, so that the effect of adjusting the angle is achieved.

4. After the mounting frame rotates, the gravity center of the equipment can shift, the handle can be controlled at the moment, the sliding block and the second connecting plate are driven to move, the stress area between the equipment and the ground can be increased by the second connecting plate at the moment, and the stability of the equipment is further increased.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a partial perspective view of the present invention.

Fig. 3 is a schematic perspective view of the injection mechanism of the present invention.

Fig. 4 is a perspective sectional view of the injection mechanism of the present invention.

Fig. 5 is a schematic perspective view of the moving mechanism of the present invention.

Fig. 6 is a schematic perspective view of the rotating mechanism of the present invention.

Fig. 7 is a partially enlarged perspective view of the rotating mechanism of the present invention.

Fig. 8 is a partial perspective view of the rotating mechanism of the present invention.

Fig. 9 is a partial perspective sectional view of the rotating mechanism of the present invention.

Fig. 10 is a schematic perspective view of the flow guide mechanism of the present invention.

Fig. 11 is a schematic view of a first partial body structure of the flow guide mechanism of the present invention.

Fig. 12 is a partial perspective sectional view of the deflector mechanism of the present invention.

Fig. 13 is a schematic view of a second partial structure of the flow guide mechanism of the present invention.

Fig. 14 is a schematic perspective view of the angle adjustment mechanism of the present invention.

Fig. 15 is a partially enlarged perspective view of the angle adjustment mechanism of the present invention.

Fig. 16 is a perspective view of the stabilizing mechanism of the present invention.

Reference numbers in the drawings: 1: base, 2: mounting frame, 3: guide plate, 31: sliding plate, 4: catheter, 41: a booster pump, 5: injection mechanism, 50: rotating sleeve, 51: head, 52: connecting rod, 53: connecting disc, 6: moving mechanism, 60: mounting plate, 61: servo motor, 62: screw, 63: moving block, 7: rotating mechanism, 70: fixing plate, 71: first pulley, 72: flat belt, 73: second pulley, 74: first cylindrical cam, 75: rotating disk, 76: second cylindrical cam, 77: first spring, 8: diversion mechanism, 80: turning rod, 81: baffle, 82: rotating plate, 83: sliding sleeve, 84: first connecting plate, 85: second spring, 86: fixing rod, 9: angle adjustment mechanism, 90: fixed block, 91: slide bar, 92: stuck block, 93: third spring, 10: stabilizing mechanism, 101: slider, 102: second connecting plate, 103: a handle.

Detailed Description

The present invention will be further described with reference to specific examples, which are illustrative of the invention and are not to be construed as limiting the invention.

Example 1

The utility model provides an explosion-proof high pressure water jet bores and expands equipment for coal mine, as shown in fig. 1-5, including base 1, mounting bracket 2, deflector 3, sliding plate 31, pipe 4, booster pump 41, injection mechanism 5 and moving mechanism 6, base 1's top rotary type is equipped with mounting bracket 2, both sides all are connected with deflector 3 around mounting bracket 2, two sliding plates 31 about sliding connection has between the deflector 3, be connected with pipe 4 between sliding plate 31, pipe 4's right side upside is equipped with booster pump 41, booster pump 41 is located between two sliding plates 31, pipe 4's left part is equipped with injection mechanism 5, be equipped with moving mechanism 6 that is used for driving pipe 4 and removes on mounting bracket 2.

The spraying mechanism 5 comprises a rotating sleeve 50, a spray head 51, connecting rods 52 and a connecting disc 53, the rotating sleeve 50 is rotatably sleeved at the left end of the guide pipe 4, the spray head 51 is arranged at the left side of the rotating sleeve 50, the right side of the rotating sleeve 50 is evenly connected with 4 connecting rods 52 at intervals, the connecting disc 53 is connected between the right sides of the connecting rods 52, and the connecting disc 53 is sleeved at the outer side of the guide pipe 4.

The moving mechanism 6 comprises an installation plate 60, a servo motor 61, a screw 62 and a moving block 63, the installation plate 60 is fixedly connected to the lower right side of the installation frame 2 through bolts, the servo motor 61 is arranged in the middle of the installation plate 60, the screw 62 is connected to an output shaft of the servo motor 61, the moving block 63 is connected to the screw 62 through threads, and the moving block 63 is connected with the guide pipe 4.

When the coal mine needs to be drilled and expanded, the device is moved to a proper position, and then the mounting frame 2 is controlled to rotate, so that the angle of the guide pipe 4 is adjusted, and the device is further suitable for drilling and expanding of different angles of the coal mine; after the adjustment is completed, a water source is connected with the right end of the guide pipe 4, the servo motor 61 is started, the servo motor 61 drives the screw rod 62 to rotate, the guide pipe 4 is driven to move towards the left side through the moving block 63, the spray head 51 is moved to a place needing drilling and expanding, then the booster pump 41 is started, the booster pump 41 can enable water flow to be sprayed out from the spray head 51 through the guide pipe 4, so that high-pressure water jet is formed, the connecting disc 53 can be controlled to rotate, the spray head 51 is driven to rotate through the connecting rod 52, so that high-pressure water cuts coal body layer by layer in the rotation process, drilling and expanding are carried out through water jet, coal dust floating can be prevented, coal mine explosion is prevented, after the coal mine drilling and expanding are completed, the booster pump 41 is closed, the strength of the water jet is reduced, then the servo motor 61 is controlled to run reversely, and the guide pipe 4 is moved towards the right side to reset, at the moment, water can continuously flow out of the spray head 51, so that the coal wall is washed, the coal mine explosion is further prevented, after the reset, the servo motor 61 is closed, and then the water source is disconnected from the guide pipe 4.

Example 2

In addition to embodiment 1, as shown in fig. 6, 7, 8 and 9, the present invention further includes a rotating mechanism 7, the rotating mechanism 7 includes a fixing plate 70, a first belt pulley 71, a flat belt 72, a second belt pulley 73, a first cylindrical cam 74, a rotating disc 75, a second cylindrical cam 76 and a first spring 77, the fixing plate 70 is disposed on the conduit 4, the first belt pulley 71 is rotatably disposed on the lower inner side of the fixing plate 70, the second belt pulley 73 is rotatably disposed on the upper inner side of the fixing plate 70, the second belt pulley 73 is connected to the connecting disc 53, the flat belt 72 is sleeved between the second belt pulley 73 and the first belt pulley 71, the first cylindrical cam 74 is disposed on the left side of the first belt pulley 71, the first belt pulley 71 and the first cylindrical cam 74 are sleeved outside the screw 62, the rotating disc 75 is connected to the left side of the screw 62, the second cylindrical cam 76 is slidably connected to the right side of the rotating disc 75, the second cylindrical cam 76 is engaged with the first cylindrical cam 74, and 4 first springs 77 are connected between the second cylindrical cam 76 and the rotating disk 75.

When the guide tube 4 moves to the left, the fixing plate 70 is driven to move to the left, and the first belt pulley 71, the flat belt 72, the second belt pulley 73 and the first cylindrical cam 74 are driven to move to the left, when the first cylindrical cam 74 moves to be matched with the second cylindrical cam 76, the first cylindrical cam 74 continues to move to the left, and the second cylindrical cam 76 is extruded to move to the left, the first spring 77 is compressed, at this time, the moving block 63 can be just separated from the thread part of the screw 62, and meanwhile, the screw 62 rotates and can drive the rotating disc 75 to rotate, and then the first cylindrical cam 74 is driven to rotate by the second cylindrical cam 76, and then the connecting disc 53 is driven to rotate, so that the spray head 51 is automatically driven to rotate.

As shown in fig. 10, 11, 12 and 13, the air guiding device further includes an air guiding mechanism 8, the air guiding mechanism 8 includes a rotating rod 80, a baffle 81, a rotating plate 82, a sliding sleeve 83, a first connecting plate 84, a second spring 85 and a fixing rod 86, the right side of the conduit 4 is rotatably connected with the rotating rod 80 through a torsion spring, the baffle 81 is disposed in the middle of the rotating rod 80, the baffle 81 is located inside the conduit 4, the rotating plate 82 is connected to both the front and rear sides of the rotating rod 80, the sliding sleeve 83 is slidably connected to the right side of the conduit 4, the first connecting plate 84 is connected to both the front and rear sides of the sliding sleeve 83, the first connecting plate 84 is respectively slidably connected to the rotating plate 82 on the same side, the second spring 85 is connected between the sliding sleeve 83 and the conduit 4, the fixing rod 86 is fixedly connected to the right side of the mounting bracket 2 through a bolt, and the fixing rod 86 contacts with the sliding sleeve 83.

Initially, the second spring 85 is in a compressed state, when the conduit 4 moves to the left, the rotating rod 80, the baffle 81, the rotating plate 82, the sliding sleeve 83 and the first connecting plate 84 are driven to move to the left together, at this time, the sliding sleeve 83 can be separated from the fixing rod 86, the second spring 85 rebounds, so that the sliding sleeve 83 and the first connecting plate 84 can move to the direction away from the rotating rod 80, at this time, the first connecting plate 84 can pull the rotating plate 82 to rotate 90 degrees counterclockwise, and further, the rotating rod 80 and the baffle 81 are driven to rotate 90 degrees counterclockwise, the torsion spring deforms, and at this time, the baffle 81 does not block water from entering the conduit 4 any more; when the guide tube 4 moves to the right side for resetting, the rotating rod 80, the baffle 81, the rotating plate 82, the sliding sleeve 83 and the first connecting plate 84 are driven to move to the right side for resetting together, at the moment, the sliding sleeve 83 can be contacted with the fixing rod 86 again, at the moment, the sliding sleeve 83 and the first connecting plate 84 do not move to the right side any more, the rotating rod 80, the baffle 81 and the rotating plate 82 continue to move to the right side for resetting, the second spring 85 is compressed, at the moment, the torsional spring is restored to drive the rotating plate 82, the rotating rod 80 and the baffle 81 rotate 90 degrees clockwise, and at the moment, the baffle 81 can stop water from entering the guide tube 4 again.

As shown in fig. 14 and 15, the angle adjusting mechanism 9 is further included, the angle adjusting mechanism 9 includes a fixing block 90, a sliding rod 91, a clamping block 92 and a third spring 93, the fixing block 90 is disposed on each of the front side and the rear side of the mounting frame 2, the sliding rod 91 is slidably disposed on the fixing block 90, the clamping block 92 is connected to the right side of the sliding rod 91, the clamping block 92 is matched with the base 1, and the third spring 93 is connected between the clamping block 92 and the upper side and the lower side of the fixing block 90.

The screens piece 92 can block the people base 1 to under the condition that other people do not control equipment, mounting bracket 2 can not rotate at will, when adjusting the angle of pipe 4, control mounting bracket 2 hard and rotate, get into because of the contractility of third spring 93, just can make screens piece 92 card go into in another draw-in groove on the base 1, reach the effect of angle modulation with this.

As shown in fig. 16, the portable electronic device further comprises a stabilizing mechanism 10, wherein the stabilizing mechanism 10 comprises a sliding block 101, a second connecting plate 102 and a handle 103, the sliding block 101 is slidably arranged in the middle of the base 1, the second connecting plate 102 is connected to the sliding block 101, and the handle 103 is connected to the upper side of the second connecting plate 102.

Mounting bracket 2 is rotatory back, can make the focus skew of equipment, this moment alright control handle 103 to drive slider 101 and second connecting plate 102 and remove, second connecting plate 102 just can increase the lifting surface area on equipment and ground this moment, and then increases the stability of equipment.

While the disclosure has been described with respect to a limited number of embodiments, those skilled in the art, having benefit of this disclosure, will appreciate that various other embodiments can be devised which do not depart from the scope of the invention as disclosed herein. Accordingly, the scope of the invention should be limited only by the attached claims.

Claims (7)

1. The utility model provides an explosion-proof high pressure water jet bores and expands equipment for coal mine, which is characterized by, including base (1), mounting bracket (2), deflector (3), sliding plate (31), pipe (4), booster pump (41), injection mechanism (5) and moving mechanism (6), the top rotary type of base (1) is equipped with mounting bracket (2), both sides all are connected with deflector (3) around mounting bracket (2), sliding type is connected with two sliding plates (31) between deflector (3), be connected with pipe (4) between sliding plate (31), the right part upside of pipe (4) is equipped with booster pump (41), the left part of pipe (4) is equipped with injection mechanism (5), be equipped with moving mechanism (6) that are used for driving pipe (4) and remove on mounting bracket (2).

2. The explosion-proof high-pressure water jet drilling and expanding equipment for the coal mine is characterized in that the injection mechanism (5) comprises a rotating sleeve (50), a spray head (51), connecting rods (52) and a connecting disc (53), the rotating sleeve (50) is rotatably sleeved at the left end of the guide pipe (4), the spray head (51) is arranged at the left side of the rotating sleeve (50), the 4 connecting rods (52) are uniformly connected to the right side of the rotating sleeve (50) at intervals, the connecting disc (53) is connected between the right sides of the connecting rods (52), and the connecting disc (53) is sleeved at the outer side of the guide pipe (4).

3. The explosion-proof high-pressure water jet drilling and expanding device for the coal mine is characterized in that the moving mechanism (6) comprises a mounting plate (60), a servo motor (61), a screw rod (62) and a moving block (63), the mounting plate (60) is connected to the lower side of the right portion of the mounting frame (2), the servo motor (61) is arranged in the middle of the mounting plate (60), the screw rod (62) is connected to an output shaft of the servo motor (61), the moving block (63) is connected to the screw rod (62) through threads, and the moving block (63) is connected with the guide pipe (4).

4. The explosion-proof high-pressure water jet drilling and expanding device for the coal mine as claimed in claim 3, which is characterized by further comprising a rotating mechanism (7), wherein the rotating mechanism (7) comprises a fixing plate (70), a first belt pulley (71), a flat belt (72), a second belt pulley (73), a first cylindrical cam (74), a rotating disc (75), a second cylindrical cam (76) and a first spring (77), the fixing plate (70) is arranged on the guide pipe (4), the first belt pulley (71) is rotatably arranged on the inner side of the lower part of the fixing plate (70), the second belt pulley (73) is rotatably arranged on the inner side of the upper part of the fixing plate (70), the second belt pulley (73) is connected with the connecting disc (53), the flat belt (72) is sleeved between the second belt pulley (73) and the first belt pulley (71), the first cylindrical cam (74) is arranged on the left side of the first belt pulley (71), the first belt pulley (71) and the first cylindrical cam (74) are sleeved outside the screw rod (62), the left side of the screw rod (62) is connected with a rotating disc (75), the right side of the rotating disc (75) is connected with a second cylindrical cam (76) in a sliding mode, the second cylindrical cam (76) is matched with the first cylindrical cam (74), and 4 first springs (77) are connected between the second cylindrical cam (76) and the rotating disc (75).

5. The explosion-proof high-pressure water jet drilling and expanding equipment for the coal mine is characterized by further comprising a flow guide mechanism (8), wherein the flow guide mechanism (8) comprises a rotating rod (80), a baffle plate (81), a rotating plate (82), a sliding sleeve (83), a first connecting plate (84), a second spring (85) and a fixed rod (86), the right side of the guide pipe (4) is rotatably connected with the rotating rod (80) through a torsion spring, the middle part of the rotating rod (80) is provided with the baffle plate (81), the baffle plate (81) is positioned on the inner side of the guide pipe (4), the two sides of the rotating rod (80) are both connected with the rotating plate (82), the right side of the guide pipe (4) is slidably connected with the sliding sleeve (83), the two sides of the sliding sleeve (83) are both connected with the first connecting plate (84), the first connecting plate (84) are respectively slidably connected with the rotating plate (82) on the same side, the second spring (85) is connected between the sliding sleeve (83) and the guide pipe (4), the right side of the mounting rack (2) is connected with a fixing rod (86), and the fixing rod (86) is in contact with the sliding sleeve (83).

6. The explosion-proof high-pressure water jet drilling and expanding device for the coal mine is characterized by further comprising an angle adjusting mechanism (9), wherein the angle adjusting mechanism (9) comprises a fixing block (90), a sliding rod (91), clamping blocks (92) and third springs (93), the fixing block (90) is arranged on each of the front side and the rear side of the mounting frame (2), the sliding rod (91) is arranged on each fixing block (90) in a sliding mode, the clamping blocks (92) are connected to the sliding rod (91), the clamping blocks (92) are matched with the base (1), and the third springs (93) are connected between the clamping blocks (92) and the upper side and the lower side of the fixing block (90).

7. The explosion-proof high-pressure water jet drilling and expanding equipment for the coal mine is characterized by further comprising a stabilizing mechanism (10), wherein the stabilizing mechanism (10) comprises a sliding block (101), a second connecting plate (102) and a handle (103), the sliding block (101) is arranged in the middle of the base (1) in a sliding mode, the second connecting plate (102) is connected onto the sliding block (101), and the handle (103) is connected to the upper side of the second connecting plate (102).

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